TTL-RS232-4P-MOD1 | TTL and RS232 Level Conversion Module
رقم المنتج: TTL-RS232-4P-MOD1
The TTL-RS232-4P-MOD1 TTL-RS232 converter is a serial level shifter with independent translation paths: TTL to RS232 and RS232 to TTL. Equipped with a DB9 RS232 female connector and a 4-pin TTL header (VCC, GND, TX, RX) and no USB port, it connects legacy RS232 devices with TTL serial units. It works for radio modification, GPS debugging, automotive testing, firmware upgrade, hard drive repair, and MCU programming of STC, STM32, NXP and more, ideal for maintenance, industrial and embedded debugging.
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نظرة عامة — TTL-RS232-4P-MOD1 | TTL and RS232 Level Conversion Module
The TTL-RS232-4P-MOD1 TTL ↔ RS232 converter module is a professional serial level-shifting unit. It provides separate level translation paths: TTL signals are translated to standard RS232 levels, and RS232 signals are translated to TTL logic levels. It features a DB9 RS232 female connector and a 4-pin TTL header (VCC, GND, TX, RX), with no onboard USB interface. Designed to interconnect legacy RS232 serial hardware and TTL serial devices, it delivers stable serial communication between mismatched serial interfaces.
This module covers many practical use cases: radio modification, GPS module debugging, automotive electronic testing, firmware flashing for DVD players and set-top boxes, hard disk repair, and others. It supports debugging and program downloading for mainstream MCUs including STC, STM32, NXP, Renesas and NEC. Compact and simple to wire, it is widely adopted for equipment maintenance, field industrial debugging and embedded system development.
أبرز المزايا — TTL-RS232-4P-MOD1 | TTL and RS232 Level Conversion Module
- ■ Separate level translation paths: TTL → RS232 and RS232 → TTL, no USB port
- ■ 4-pin TTL header: VCC, GND, TX, RX
- ■ Supply voltage 3.3V ~ 5.5V, powered from the TTL side
- ■ Compatible with STC, STM32, NXP, Renesas, NEC MCU programming and debugging
- ■ Connects legacy RS232 serial devices: industrial equipment, GPS, set-top boxes, automotive serial ports
- ■ Pre-assembled module, compact size, convenient for embedded debugging
المواصفات الفنية — TTL-RS232-4P-MOD1 | TTL and RS232 Level Conversion Module
- Basic Parameters
- Model
- TTL-RS232-4P-MOD1
- Conversion Type
- Separate level translation paths: TTL → RS232 and RS232 → TTL
- TTL Pins
- VCC, GND, TX, RX
- Interface
- DB9 Female (RS232) + 4-Pin Header (TTL), No USB
- Supply Voltage
- 3.3V ~ 5.5V (Powered from TTL side)
- Recommended Baud Rate
- ≤ 115200 bps
- Isolation
- Non-isolated
- Form Factor
- Assembled Module (With Connectors)
- Typical Applications
- ■ Radio
- Refitting and signal debugging
- ■ GPS
- Module debugging and automotive serial testing
- ■ Firmware
- Set-top box / DVD firmware flashing
- ■ MCU
- STC, STM32, NXP, Renesas, NEC programming & debugging
- ■ Maintenance & Development
- Hard drive repair and embedded system development
التنزيل — TTL-RS232-4P-MOD1 | TTL and RS232 Level Conversion Module
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الأسئلة الشائعة
What is the Tittron TTL-RS232-4P-MOD1?
The TTL-RS232-4P-MOD1 is a TTL-RS232 level conversion module with separate translation paths: TTL signals are translated to standard RS232 levels, and RS232 signals are translated to TTL logic levels. It has a DB9 female RS232 connector on one side and a 4-pin TTL header (VCC, GND, TX, RX) on the other, with no USB interface. It links legacy RS232 equipment to TTL serial devices for debugging, programming and maintenance.
Does it need a USB connection or driver?
No. The module has no USB port and requires no driver. It is powered from the TTL side (3.3V to 5.5V) and works as a pure level translator between RS232 and TTL serial signals.
How should I wire TX, RX and GND?
Connect module TX to device RX, and module RX to device TX. The GND of both sides must be linked — a missing common ground causes garbled data, communication failure or hardware damage.
Can I connect the RS232 side directly to MCU I/O pins?
No. The DB9 port carries RS232 levels of about ±10V while the 4-pin header is TTL level. Feeding RS232 signals directly into MCU I/O pins will burn the port. This module has no electrical isolation.
What power supply and baud rate should I use?
Only 3.3V to 5.5V input is allowed — never 12V or 24V, and never reverse VCC and GND. Match the supply to your TTL device logic level. Baud rate, data bits, stop bits and parity must be identical on both sides; rates above 115200 bps risk packet loss.
Which MCUs and applications is it used for?
It supports programming and debugging of STC, STM32, NXP, Renesas and NEC microcontrollers, and is widely used for radio modification, GPS debugging, automotive testing, set-top box and DVD firmware flashing, and hard drive repair.
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